Ocean Quahog

Ocean Quahog

Observation - Ocean Quahog - UK and Ireland. Description: The Ocean Quahog is likely to be the World's longest-lived creature. It is quite rare to find the Quahog's joined-up shell, as the creatures usually live in deep water. One other can be seen here http://www.ispot.org.uk/node/40262. The structure of th

The Ocean Quahog is likely to be the World's longest-lived creature.
It is quite rare to find the Quahog's joined-up shell, as the creatures usually live in deep water. One other can be seen here http://www.ispot.org.uk/node/40262.

The structure of the valve area is seen in picture three and I suppose it figures in proper identification.
The close-up shows growth-rings as seen on the shell's surface.
The brown 'varnish' is the periostracum. It is rubbing off and should not be seen as part of the ring structure. The small gradations on the rule are half-a-millimetre. Close inspection reveals, in some places, there are at least 5 rings per millimetre. This shell is over 9cms across the ring pattern - you can do the math but that HAS to be old!
I found this very interesting http://www.bsra.org.uk/e-lifespan/my-favorite-system/long-lived-clam-arctica-islandica-new-model-species-ageing-research
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Edit: I made another post in June
http://www.ispot.org.uk/node/337536